2008-08-08 Richard Sandiford <rdsandiford@googlemail.com>

[thirdparty/binutils-gdb.git] / ld / emulparams / elf32bmipn32-defs.sh

diff --git a/ld/emulparams/elf32bmipn32-defs.sh b/ld/emulparams/elf32bmipn32-defs.sh
index f7b0d08f858f146a4b989bddef7c9ecb1fbb65b8..45bfd5d7883f3c836375f1e8da8c82a536545d95 100644 (file)
--- a/ld/emulparams/elf32bmipn32-defs.sh
+++ b/ld/emulparams/elf32bmipn32-defs.sh
@@ -11,6 +11,7 @@ BIG_OUTPUT_FORMAT="elf32-bigmips"
 LITTLE_OUTPUT_FORMAT="elf32-littlemips"
 
 TEMPLATE_NAME=elf32
+EXTRA_EM_FILE=mipself
 
 case "$EMULATION_NAME" in
 elf32*n32*) ELFSIZE=32 ;;
@@ -30,15 +31,47 @@ fi
 LIBPATH_SUFFIX=$ELFSIZE
 
 GENERATE_SHLIB_SCRIPT=yes
+GENERATE_PIE_SCRIPT=yes
 
 TEXT_START_ADDR=0x10000000
-MAXPAGESIZE=0x100000
+MAXPAGESIZE="CONSTANT (MAXPAGESIZE)"
 ENTRY=__start
 
+# Unlike most targets, the MIPS backend puts all dynamic relocations
+# in a single dynobj section, which it also calls ".rel.dyn".  It does
+# this so that it can easily sort all dynamic relocations before the
+# output section has been populated.
+OTHER_GOT_RELOC_SECTIONS="
+  .rel.dyn      ${RELOCATING-0} : { *(.rel.dyn) }
+"
 # GOT-related settings.  
+# If the output has a GOT section, there must be exactly 0x7ff0 bytes
+# between .got and _gp.  The ". = ." below stops the orphan code from
+# inserting other sections between the assignment to _gp and the start
+# of .got.
 OTHER_GOT_SYMBOLS='
+  . = .;
   _gp = ALIGN(16) + 0x7ff0;
 '
+# .got.plt is only used for the PLT psABI extension.  It should not be
+# included in the .sdata block with .got, as there is no need to access
+# the section from _gp.  Note that the traditional:
+#
+#      . = .
+#      _gp = ALIGN (16) + 0x7ff0;
+#      .got : { *(.got.plt) *(.got) }
+#
+# would set _gp to the wrong value; _gp - 0x7ff0 must point to the start
+# of *(.got).
+GOT=".got          ${RELOCATING-0} : { *(.got) }"
+unset OTHER_READWRITE_SECTIONS
+unset OTHER_RELRO_SECTIONS
+if test -n "$RELRO_NOW"; then
+  OTHER_RELRO_SECTIONS=".got.plt      ${RELOCATING-0} : { *(.got.plt) }"
+else
+  OTHER_READWRITE_SECTIONS=".got.plt      ${RELOCATING-0} : { *(.got.plt) }"
+fi
+
 OTHER_SDATA_SECTIONS="
   .lit8         ${RELOCATING-0} : { *(.lit8) }
   .lit4         ${RELOCATING-0} : { *(.lit4) }
@@ -50,7 +83,12 @@ TEXT_START_SYMBOLS='_ftext = . ;'
 DATA_START_SYMBOLS='_fdata = . ;'
 OTHER_BSS_SYMBOLS='_fbss = .;'
 
-INITIAL_READONLY_SECTIONS=".MIPS.options : { *(.MIPS.options) }"
+INITIAL_READONLY_SECTIONS=
+if test -z "${CREATE_SHLIB}"; then
+  INITIAL_READONLY_SECTIONS=".interp       ${RELOCATING-0} : { *(.interp) }"
+fi
+INITIAL_READONLY_SECTIONS="${INITIAL_READONLY_SECTIONS}
+  .reginfo      ${RELOCATING-0} : { *(.reginfo) }"
 # Discard any .MIPS.content* or .MIPS.events* sections.  The linker
 # doesn't know how to adjust them.
 OTHER_SECTIONS="/DISCARD/ : { *(.MIPS.content*) *(.MIPS.events*) }"